I wonder, would it help if you found a ritual for these anniversary days or months?
Writing down your fears and regrets and then burning them?
Getting small tea candles, and lighting one each day and telling yourself that you would mourn for the time it takes the candle to burn out, and then you will eat something sweet and go about your day?
A mantra that you chant when you feel sad?
Loading up a backpack with stones that symbolize bad memories and then throw them one at a time into a river?
I'm not great at rituals, but maybe one of these will spark a better idea.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16